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Quarterly information (unaudited) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified |
1 Months Ended | 3 Months Ended | 12 Months Ended | |||||||||
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Jun. 30, 2013
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Sep. 30, 2013
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Jun. 30, 2013
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Mar. 31, 2013
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Dec. 31, 2012
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Sep. 30, 2012
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Jun. 30, 2012
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Mar. 31, 2012
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Dec. 31, 2011
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Sep. 30, 2013
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Sep. 30, 2012
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Sep. 30, 2011
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| Quarterly information (unaudited) | ||||||||||||
| Stock split | 2 | |||||||||||
| Revenue | $ 384,339 | $ 334,323 | $ 326,351 | $ 286,266 | $ 300,737 | $ 266,353 | $ 243,452 | $ 239,603 | $ 1,331,279 | $ 1,050,145 | $ 929,633 | |
| Gross profit | 117,499 | 94,560 | 97,444 | 76,530 | 84,629 | 78,701 | 64,766 | 59,847 | 386,033 | 287,943 | 253,651 | |
| Net income | $ 35,626 | $ 28,100 | $ 31,689 | $ 21,316 | $ 23,671 | $ 20,485 | $ 14,273 | $ 17,704 | $ 116,731 | $ 76,133 | $ 81,168 | |
| Basic earnings per share: | ||||||||||||
| Income from continuing operations (in dollars per share) | $ 0.52 | $ 0.41 | $ 0.47 | $ 0.32 | $ 0.35 | $ 0.30 | $ 0.21 | $ 0.26 | $ 1.72 | $ 1.12 | $ 1.19 | |
| Loss from discontinued operations (in dollars per share) | $ (0.01) | $ (0.01) | $ (0.01) | $ (0.01) | ||||||||
| Basic earnings per share (in dollars per share) | $ 0.52 | $ 0.41 | $ 0.46 | $ 0.31 | $ 0.35 | $ 0.30 | $ 0.21 | $ 0.26 | $ 1.71 | $ 1.12 | $ 1.18 | |
| Diluted earnings per share: | ||||||||||||
| Income from continuing operations (in dollars per share) | $ 0.51 | $ 0.40 | $ 0.45 | $ 0.31 | $ 0.34 | $ 0.29 | $ 0.21 | $ 0.26 | $ 1.68 | $ 1.09 | $ 1.16 | |
| Diluted earnings per share (in dollars per share) | $ 0.51 | $ 0.40 | $ 0.45 | $ 0.31 | $ 0.34 | $ 0.29 | $ 0.21 | $ 0.26 | $ 1.67 | $ 1.09 | $ 1.14 | |
| X | ||||||||||
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- Definition
The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amount of net income (loss) from continuing operations per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The amount of net income (loss) derived from continuing operations during the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Per basic share amount, after tax, of income (loss) from the day-to-day business activities of the discontinued operation and gain (loss) from the disposal of the discontinued operation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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